公开(公告)号：US5629738A

公开(公告)日：1997-05-13

申请号：US480327

申请日：1995-06-07

申请人： Hak-sung Kim

发明人： Hak-sung Kim

IPC分类号： H04N7/035 ,  H04N7/087

CPC分类号： H04N7/0355 ,  H04N7/0352

摘要： A detection clock generating apparatus generates a detection clock signal for detecting digital data contained in the vertical blanking period of a received composite video signal. A slicer generates a slicing reference signal based on the analog clock run-in signal and slices the received analog clock run-in signal by using the generated slicing reference signal. A synchronizing portion synchronizes the sliced data with an internal clock signal. An edge detecting portion detects the rising edges of pulses of the synchronized sliced data and outputs an edge detection signal. A clock generator generates a detection clock signal on based on the pulses of the edge detection signal.

摘要翻译： 检测时钟生成装置生成用于检测包含在接收的复合视频信号的垂直消隐期间的数字数据的检测时钟信号。 切片器基于模拟时钟输入信号生成切片参考信号，并使用生成的切片参考信号对接收的模拟时钟输入信号进行分片。 同步部分将分片数据与内部时钟信号同步。 边缘检测部分检测同步分片数据的脉冲的上升沿并输出边缘检测信号。 时钟发生器基于边缘检测信号的脉冲产生检测时钟信号。